Setting your crontab job every 3 minutes
In case you have set your crontab and you need to call web page http://example.com/webpage.html
the every 3 minutes:
*/3 * * * * /usr/bin/wget -O /dev/null http://example.com/webpage.html
To set the cron service execute:
service crond start
Edit crontab call:
crontab -e
Restart crond:
service crond restart
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